show ip multicast cluster mcache

Displays information in the multicast forwarding mcache.
Syntax
show ip multicast cluster mcache [ ip-address ]
show ip multicast cluster mcache [ vlan vlan-id ] [ ip-address ]
Parameters
cluster
Specifies a Multi-Chassis Trunking (MCT) cluster.
ip-address
Specifies an IP address.
vlan vlan-id
Specifies a VLAN.
Modes

User EXEC mode

Usage Guidelines

The IGMP snooping mcache contains multicast forwarding information for VLANs, and you must use the show ip multicast mcache command to display multicast forwarding information for VLANs..

The show ip multicast mcache command displays the following information:

Output Field

Description

(source group)

The source and group addresses of this data stream. (* group) means match group only; (source group) means match both.

For snooping when it is mac-based, Only *,G entries will be present in multicast mcache output for ipv4 and ipv6. S,G entries will not be present.

MAC address

The multicast MAC address. If the device supports MAC-based IGMP snooping, the MAC address is matched for forwarding decision.

IPv4 Multicast Forwarding Mode This option is dynamic. If snooping is MAC-based, MAC will be displayed and if it is IP-based then IP is displayed.

cnt

The number software-processed packets.

static Static mulitcast addresses
flood Flooded traffic.
drop Dropped traffic.

OIF

The output interfaces. Static groups apply to the entire VLAN if "entire vlan" is displayed.

age

The age of the mcache. The mcache will be reset to 0 if traffic continues to arrive; otherwise the mcache will be aged out when it reaches the time defined by the ip multicast mcache-age command.

up-time

The uptime of this mcache in seconds.

ref-cnt

Indicates the number of mcaches using the VIDX. The VIDX is shared among mcaches having the same output interfaces.

Examples

The following example shows information in the multicast forwarding mcache. 

device> show ip multicast mcache

Example:
    (S G) (MAC ADDR) cnt=: SRC and GRP IPv4/IPv6 address,
    Multicast Mac address, cnt is number of SW processed packets
    OIF: 1/1/22 TR(1/1/32,1/1/33), TR is trunk, 1/1/32 primary, 1/1/33 output
IPv4 Multicast Forwarding Mode: MAC
                                                                                 
Total Multicast Cache: 10
vlan 4089, 10 caches. 
1    (* 225.1.1.1) (0100.5e01.0101) cnt=97
     OIF: tag e1/1/2 
     age=3s up-time=4372s, change=448s l2mc=257 (ref-cnt=1)
2    (* 236.1.1.8) (0100.5e01.0108) cnt=4
     OIF: tag e1/1/2 
     age=9s up-time=4372s, change=439s l2mc=257 (ref-cnt=1)

The following example shows information in the multicast forwarding mcache on MCT cluster device.

device> show ip multicast cluster mcache

Example:
    (S G) (MAC ADDR) cnt=: SRC and GRP IPv4/IPv6 address,
    Multicast Mac address, cnt is number of SW processed packets
    OIF: 1/1/22 TR(1/1/32,1/1/33), TR is trunk, 1/1/32 primary, 1/1/33 output
         [1,10]: [1 - has local oif, 10 - ICL due to CCEP count]
IPv4 Multicast Forwarding Mode: IP
Total Multicast Cache: 1
vlan 11, 1 caches. 
1    (192.85.1.44 225.1.1.1) (0100.5e01.0101) cnt=2
     OIF: tag e1/1/35 [1,0] tag lg130 [0,1] tag e1/1/5 [1,0] tag lg1 [1,0] 
     age=28s up-time=28s, change=28s ipmc=361 (ref-cnt=1)

The following example displays information in the multicast forwarding mcache, including static mcache profile information and flooded and dropped mcaches.

device> show ip multicast cluster mcache

Example:
(S G) (MAC ADDR) cnt=: SRC and GRP IPv4/IPv6 address,
Multicast Mac address, cnt is number of SW processed packets
OIF: 1/1/22 TR(1/1/32,1/1/33), TR is trunk, 1/1/32 primary, 1/1/33 output
IPv4 Multicast Forwarding Mode: IP
Total Multicast Cache: 13
vlan 10, 3 caches.
1 (* 225.0.0.2) (0100.5e00.0002) cnt=0
OIF: flood
age=5s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
2 (* 225.1.2.250) (0100.5e01.02fa) cnt=0
OIF: flood
age=20s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
3 (* 225.0.1.10) (0100.5e00.010a) cnt=0
OIF: drop
age=0s up-time=3739s, change=3739s ipmc=0 (ref-cnt=1) static

vlan 20, 7 caches.
1 (* 239.255.255.253) (0100.5e7f.fffd) cnt=0
OIF: flood
age=20s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
2 (* 224.0.1.129) (0100.5e00.0181) cnt=0
OIF: flood
age=5s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
3 (* 224.0.1.130) (0100.5e00.0182) cnt=0
OIF: flood
age=27s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
4 (* 239.255.255.250) (0100.5e7f.fffa) cnt=0
OIF: flood
age=18s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
5 (* 224.0.1.1) (0100.5e00.0101) cnt=0
OIF: flood
age=0s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
6 (* 224.0.1.132) (0100.5e00.0184) cnt=0
OIF: flood
age=11s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
7 (* 224.0.1.131) (0100.5e00.0183) cnt=0
OIF: flood
age=12s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
vlan 30, 3 caches.
1 (* 225.0.0.2) (0100.5e00.0002) cnt=0
OIF: flood
age=5s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
2 (* 225.1.2.250) (0100.5e01.02fa) cnt=0
OIF: flood
age=20s up-time=3739s, change=3739s ipmc=2 (ref-cnt=1) static
3 (* 225.0.1.10) (0100.5e00.010a) cnt=0
OIF: drop
age=0s up-time=3739s, change=3739s ipmc=0 (ref-cnt=1) static
History
Release version Command history
08.0.20 This command was modified to display Multi-Chassis Trunking (MCT) cluster information.
08.0.92 The command output was modified.
09.0.00 The command output was modified to include information for static mcache profile infomration and flooded and dropped mcaches.
Parent topic: Show Commands